Low-frequency noise mitigation and bandgap engineering using seismic metamaterials for terrestrial gravitational wave observatories

Abstract Gravitational waves have become one of the most important observational methods for studying the Universe since their first detection. However, ground-based observatories have an inherent barrier to their detection frequency band due to the seismic and gravity gradient noises near the pertu...

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Bibliographic Details
Published in:Progress of theoretical and experimental physics 2023-04, Vol.2023 (4)
Main Author: Oh, John J
Format: Article
Language:English
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Summary:Abstract Gravitational waves have become one of the most important observational methods for studying the Universe since their first detection. However, ground-based observatories have an inherent barrier to their detection frequency band due to the seismic and gravity gradient noises near the perturbation of the surroundings. A recent intriguing development of artificial structures for media called metamaterial is opening a new branch of wave mechanics and its application in various fields, in particular suggesting a novel way of mitigating noises by controlling the media structure for propagating waves. In this paper, we propose a novel framework for handling noises in ground-based gravitational wave detectors by using wave mechanics under metamaterial media. Specifically, we suggest an application of the bandgap engineering technique for mitigating the underground effects of acoustic noises resulting from seismic vibration in the KAGRA gravitational wave observatory.
ISSN:2050-3911
2050-3911
DOI:10.1093/ptep/ptad040